Has Citi Bikes Reduced Traffic Congestion in NYC?

Bike-share programs in cities have enjoyed growing popularity in recent years. From just 13 programs in 2004 it has grown to 855 in 2015. However, doubts remain on their effectiveness on reducing traffic congestion. According to INRIX, New York City ranks #5 in the Top 10 worst traffic cities in America. Using transactional data on taxi-ridership and Citi Bike data, we hope to understand if the introduction of Citi Bikes (in 2013) reduced congestion in New York City and its impact on taxi ridership. The insights can inform City Planners on decisions relating to expanding the bike-share program further, as well as help the program operator identify untapped customer segments that travel on popular bike routes via taxis.